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Finding the Fourth Proportional to 11,425.02, 15,764.88 and 6,388.56

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Solution

The fourth proportional to 11,425.02, 15,764.88 and 6,388.56 is: 8,815.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,425.02 : 15,764.88 = 6,388.56 : x
  2. Step 2: Convert to fraction form
    11,425.02/15,764.88 = 6,388.56/x
  3. Step 3: Cross multiply
    11,425.02x = 15,764.88 × 6,388.56
  4. Step 4: Simplify right side
    11,425.02x = 100,714,881.77
  5. Step 5: Solve for x
    x = 100,714,881.77/11,425.02
  6. Step 6: Final answer
    x = 8,815.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.